Fix monster-comes-into-view messages when the monster was already in view to

start with.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@762 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on January 2, 2007
R325RPUV26YH65VIJKYEFZ2XCVXQHO5N3ELPX6RNQ5TSI3JJNQGQC
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